1973

• Production : 1973
• Display : GDT 8
• Power : 4 x C
• Made : Japan


• Identical to the Weltron and
  Kovac K80 models
• 445 CHF in 1973 = 900 € in today money


• Additional information
• Advertising

1975

• Production : 1975
• Display : VFD 8
• Power : 2 X AA
• Made : ?


• Additional information

1976

• Production : 1976
• Display : VFD 8
• Power : 2 X AA
• Made : Germany


• Additional information

1976

• Production : 1976
• Display : VFD 8+2
• Power : 2 X AA
• Made : Germany


• Scientific model


• Additional information

1979

• Production : 1979
• Display : VFD 8
• Power : 6 X NiCd
• Made : ?


• With printer output
• Identical to the Unitrex 8PPMD


• Additional information

1985

• Production : ~1985
• Display : LCD 8
• Power : Solar
• Made : Taiwan


• Bottle opener

1989

• Production : 1989
• Display : LCD 8
• Power : Solar
• Made : ?


• Identical to the Intertronic Mini 8 and Merangue DP-828
• See clone Type 176